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Table 1 Reasons for early withdrawal

From: Participant characteristics associated with withdrawal from a large randomized trial of spermicide effectiveness

Reason Participants N = 635
  n %
Discontinued by site   
   Safety concerns 38 6%
   Site closure/staff error 11 2%
Participant decision, reason provided* 204 32%
   Unwillingness to continue study visits 60 9%
   Objections from partner 48 8%
   Desire to change contraceptive method 42 7%
   Separation from partner 40 6%
   Side effects or other medical events 37 6%
   Cessation of sexual activity 18 3%
   Dissatisfaction with spermicide 8 1%
   Distrusted contraceptive efficacy 8 1%
   Desire for pregnancy 7 1%
   Mistaken suspicion of pregnancy 4 1%
Participant decision, reason unknown 382 60%
  1. *Participants may have provided more than one reason
  2. Considered "related to spermicide" in text